Rotary pump of the oscillating-blade type



Nov. 18, 1930. POIRMEUR 3 3 ROTARY PUMP OF THE OSCILLATING-BLADE TYPE Filed Sept. 25, 1929 /llllll/f/lllll//m -Patented Nov. 18, 1930 UNITED "STATES -PATENT OFFICE LOUIS ILDEVEBT rommnun, OF Manu, FRANCE k ROTARYEUMP OF THE OSCILLATING-BLADE TYBE Application filed September 25,-1929, Seria1 Ne. 395,139, and in France October 5, 1929.

y My invention relates to that type of rotary' V I but obviously the number of 'blades s immaterial. 1

pumps or' compressors wherein a rotor s adapted to rotate eccentrically-in the bore of 'astator, while remaining tangent to the wall of said bore; the space comprised` between the stator and the rotor, into which open the suction and exhaust po`rts,being swept by oscillating blades ivotally Secured to the rotor. In this type o pumps there is generally provided along' the generatrix of contact between the rotor and'the stator a fluid ;tight 4 packing borne by the latter with a view to prevent any communication between the suetion and exhaust pipes. 4

l My invention has for its particular object improvements 'in rotary pumps showing the above disclosed features. Said' improvements consis t chiefly in the arrangement 011 the rotor of the devices adapted to provide fluid tightness 'between the rotor and the stator, whereby said devices rotate integrally with therotor. 'Among other advantages, this does away with all parasitical friction and allows, owing to the multiplication of the i parted thereto, a constant shiftin'g of said elements; Therefore, the pumps constructed according to my invention, are adapted for carrying water or any other liquid holding` in suspension solid particles or material such as sand,"earth and the like. The packing elements are preferably constituted by pivoting parts, hingedly Secured tothe rotor in a mana ner similar'to the Operating blades but open- `ing in the direction opposed to that of said blades. The' outer cylindrical surface of these parts is preferably leather-coated so ast`0 improve the fluid tghtness between the said surface and the wall of the stator.

I have described hereinbelow 'and'shown on accompanying drawings 'a form of my inven tion:

Fig. 1 is a diagrammatical view ofa-pump showing the essential' features of theinven-f tion. u o 4 A Figs. 2 and 3 are a vertical and a horizontal cross-section. of a pump to which the improvements have been applied. A I have assume@ ili-the exam le shown that the pump is to rotate in a pre 'etermined diis disposed in a manner such that it opens in packing elements 'and the movement im-" 'the shutters so that the blades may when de- As stated hereinabove, the essential feature of my invention consists in that the fluidtight packingsto be interposed between the stator 1 and the rotor 2 for separating the fluid suction pipe 3and the fluid outlet pipe i 4, are carried by the rotor with which there fore they revolve. To this end, the rotor 2 is provided between a two consecutive blade s, with a cylindrical shutter 6`pivotally Secured to said rotor along a generatrix. The shutter a direction opposed to that of the rotor blades 5 (Fig. 1).` It is provided on its `outer surface, With a leather packng 7 similar to that provided on the blades. Thus,'when the shutter arrives 'near the Contacting generatrix or line of tan'gence of the stator with the rotor, the pressure of the fluid causes it to bear against the said stator'whereby it provides the desired watertight separation between the suction and outlet chambers.

In the example shown, each blade 5 is dis- 7 posed with its corres onding shutter in a lateral recess formed n the wall of the rotor 2; the blade and shutter are pivoted to the ribs 8 appearing thus on the surface of the rotor. A chamber 9 may be provided inside the rotor 2, underneath the blades 5 and shutter 6 so as to reduce the weight of thero tating'parts and to allow compensation between the pressures exerted oneither side o the blades and shutters.

In the case where the pump is to operate indifl'erently in both directions, I give the same peripheral width to the blades and to sired act as shutters and reversely. The rotor 2 may be provided with lateral leather cheeks or thelikeensuring lateral fluid-tightness in'cooperation with the flanges closing' 95 the stator 1.

'Inside the stator bore are provided grooves 10 starting from the suction and outlet. pipes 3 and 4 and extending from the axis of said pipes over an'angular distance of about 90i Instead of providing these grooves in the stator 1, I may use alining' for the stator the they arrive near the cylindrical wall of which is provided with Slots playing the part of the said grooves. Ither of these arrangements allows the ppes 3 and 4 to be at 90 from one another as shown. What I claim is:

1. A rotary machine comprising .a bored stator, a rotor adapted to rotateeccentrically inside the stator bore and to remain in contact with the wall thereof along a predetermined generatrix, a fluid inlet and a fluid outlet on eithe side of said generatrix, a series of blades pivotally secured to the rotor and adapted to open in a given direction and to come into contact with the wall of the bore and a series 'of cylindrical shutters provided with a yielding cover at their outer edge pivotally Secured to the rotor and adapted to rotate in the opposite direction and to come into fluid-tight engagement with the wall of the bore throughout the length thereof when generatrix of contact of the stator bore.

2. In a rotary machine the combination of a bored stator, a rotor adapted to rotate eccentrically inside the stator bore and provided with a series of radial recesses, a' series of blades and of shutters pivotally secured to the rotor at the outer edges of the said recesses and adaptedto come into engagement with the wall of the stator bore, the blades and shutters opening in opposite directions 2 the provision on either side of the fludtight closure of a fluid inlet and a fluid outlet respectively, a slotted lining for the stator bore, the slots therein extendng from said inlet and outlet to a point at an angular distance of substantially 90 beyond same.

In testimony whereof I aflix my signature.

LOUIS ILDEVERT POIRMEUR.

respectively away from the rotor and the shutters providing a fluidtight closure between the chambers formed between thechambers formed between the rotor and the stator on either side of the generatrices thereof which are the nearest one to the other. 3. ln a rotary machine as claimed in claim 2, yielding flanges at either' end of the rotor,

'with the wall of the stator bore, the blades and shutters opening in opposite directions respectively away from the rotor and both adapted to provide a fluid tight closure between the chambers formed between the rotor and the stator on either side of the generatrilces thereof which are the nearest one to the ot er. v

5. In a rotary machine as claimed in claim 2 the provision on either "side of the fiuid-- tight. closure of a fluid inlet and a fluid' outlet respectiveiy and grooves formed on the i stator bore wall and extending from said inlet and outlet to a point of an angular distance of substantially 90 beyond same.

6. \In a rotary machine as claimed in claim 

